public class test {
    public static void main(String[] args) {
        System.out.println(Student.number);
        System.out.println(Student.number);
        System.out.println(Student.number);
        System.out.println(Student.name);


        System.out.println("--------------------");
        Student s1 = new Student();
        Student s2 = new Student("张磊");
    }
}
